单项选择题
A.sum B.amount C.number
The Europeans （）to stay ahead in aeroplane design.A.fai...
单项选择题The Europeans （）to stay ahead in aeroplane design.
A.failed B.missed C.lost
Mary （） into the room.A.burstB.crashedC.hit
单项选择题Mary （） into the room.
A.burst B.crashed C.hit
The war （） in 1937.A.broke upB.broke offC.broke out
单项选择题The war （） in 1937.
A.broke up B.broke off C.broke out
